An aerosol dual-dispensing shutoff valve adapted to dispense a plurality of fluids from separate sources and to shut off automatically upon the depletion of one of the sources

ABSTRACT

An aerosol dual-dispensing shutoff valve adapted to dispense a plurality of separate fluids from separate sources through a common outlet; said valve having automatic shutoff valves sensitive to the respective separate fluid sources, whereby said valves may respond automatically to shutoff all of said sources from said outlet when any one of said sources is substantially depleted.

United States Patent Inventors Samuel Benjamin Prussin Los Angeles;

Jimmie L. Mason, Hacienda Heights, Calif.

Appl. No. Filed Patented Assignee July 14, 1969 Apr. 20, 1971 DartIndustries, Inc. Los Angeles, Calif.

[56] References Cited UNITED STATES PATENTS 2,583,986 1/1952 Bohnson, Jr137/111X 2,638,928 5/1953 Stadler 137/1 11X 3,520,449 7/1970 Prussin etal... 222/66 AEROSOL DUAL DISPENSING SHUTOFF VALVE ADAPTED TO DISPENSE APLURALITY OF FLUIDS FROM SEPARATE SOURCES AND TO SHUT OFF AUTOMATICALLYUPON THE DEPLETION OF ONE OF THE SOURCES 8 Claims, 8 Drawing Figs.

US. Cl 222/135, 222/335, ZZZ/402.24, Int. Cl

Field of Search 135,145, 335, 402.24; 239/304, 413, 414, 415, 417.5;137/111, 114,(Inquired) Primary Examiner-Robert B. Reeves AssistantExaminer-David A. Scherbel Att0rneys Paul R. Wylie, Harold R. Beck andLeigh B.

Taylor ABSTRACT: An aerosol dual-dispensing shutoff valve adapted todispense a plurality of separate fluids from separate sources through acommon outlet; said valve having automatic shutoff valves sensitive tothe respective separate fluid sources, whereby said valves may respondautomatically to shutoff all of said sources from said sources issubstantially depleted.

said outlet when any one of PATENTEUAPR20|97| 3575,31? v sum 1 OF 3 immmPATENTEH APRZO I97! SHEET 3 OF 3 AEROSOL DUAL DISPENSING SHUTOFF VALVEADAPTED TO DISPENSE A PLURALITY OF FLUIDS FROM SEPARATE SOURCES AND TOSHUT OFF AUTOMATICALLY UPON THE DEPLETION OF ONE OF THE SOURCESBACKGROUND OF THE INVENTION Aerosol dual-dispensing shutoff valves havebeen utilized in connection with the dispensation of a plurality offluids from container means, and through a common outlet. Suchdispensation has included various reactive materials, such as those usedto produce hot-foam shave lather or oxidation hair dye, or the like.

Various products which concurrently dispense a plurality of fluids andmix them to attain a chemical reaction, and an end product at the outletof the valve, may function dangerously in the event any one of thereactive fluids is dispensed singly, and therefore the operation ofprior art valves has posed a problem with relation to the dualdispensing and mixing of reactive chemicals to attain an end product atthe outlet of the respective aerosol valve.

Aerosol containers for such purposes may include a plurality ofcompartments or a collapsible bag inside a substantially rigidcontainer, and the substantially rigid container may hold one fluidwhile the collapsible bag holds another, and a vaporizing propellentfluid, in the rigid container and surrounding the collapsible container,may result in the pressurization of both fluids in the substantiallyrigid container and the collapsible container.

Accordingly, since both fluids are pressurized, and in the event any oneof the fluids might be harmful if dispensed singly, it is imperativethat the substantial depletion or exhaustion of either of the fluidsfrom the respective sources in the container means dictates that themechanism of the respective dispensing valve be capable of shutting offboth fluids from the valve-dispensing outlet in the event of substantialdepletion or exhaustion of either of such fluids. In the case ofoxidation hair dye, for example, the materials, used in the separatefluid sources to react chemically preliminary to the passage of suchfluids from the outlet of the valve, may be harmful if either of thefluids is dispensed individually onto a persons hair or skin.

It will be obvious, to those skilled in the art, that many otherproducts may be produced by chemical reaction of a plurality of fluidsas they are dispensed from a valve in connection with adual-compartmented aerosol container.

It will also be recognized that valve mechanisms for use in aerosolcontainers must be quite compact, as well as being economical to produceand assemble.

SUMMARY OF THE INVENTION The present invention relates to an aerosoldual-dispensing shutoff valve adapted concurrently to dispense aplurality of relatively reactive products of materials therethrough toproduce such end products, from the outlet of the valve, as hot-foamshave lather, oxidation hair dyes, or other products in which reactivematerials must be brought together preliminary to dispensing suchmaterials from the outlet of the valve to produce an end product.

Specifically, the invention comprises a novel combination offluid-actuated shutoff valves which communicate with a plurality ofsources of fluid, under pressure; said shutoff valves cooperativelyarranged in order that each shutoff valve communicating with each sourceof fluid will automatically shutoff in response to the depletion orexhaustion of any one of said fluid sources, whereby the dispensingvalve of the invention will not dispense any individual fluid from anyindividual source within an aerosol container in connection therewith.

The dual-dispensing shutoff valve of the invention employs a novelshutoff valve actuating means which is responsive to both the flow ofliquid and gasifying aerosol-propellent material, such that a pressuredifferential exists across a movable actuating member of the saidshutoff valve when liquid flows through an orifice associated therewith,and said pressure differential automatically changes when the liquid isexhausted and when a gas of the gasifying propellent fluid flows throughsaid orifice, whereby said change in pressure differential causes saidshutoff valve of the invention to be actuated.

Another novel combination of the invention includes a plurality ofautomatic shutoff valves responsive to a plurality 'of individualpressurized fluid sources, and whereby the actuation of either of saidvalves influences the actuation of the other ofsaid valves so that inthe event either source offluid becomes substantially depleted orexhausted, one of the valves responds thereto and causes closing oractuation of both of said valves, so that in a dual-dispensing system,according to the invention, both fluid sources are shutoff in the eventeither source becomes substantially depleted or exhausted.

Another novel combination of the invention relates to an aerosoldual-dispensing automatic shutoff valve, wherein a plurality ofautomatic shutoff valves are responsive to a plurality of fluids issuingfrom a plurality of fluid sources to a manually operable dispensingvalve having two valve passages associated respectively with the'sourcescommunication with said shutoff valves, and wherein novelpressure-differential controlling orifices, related to the respectivesources and respective shutoff valves, provide for pressure-differentialoperation of the shutoff valves in response to operation of the manuallyoperable dispensing valve of the invention.

Another object of the invention is to provide an aerosol dual-dispensingshutoff valve which is particularly safe for use in dispensing aplurality of relatively dangerous chemicals from a plurality of sourcesand for mixing the chemicals and dispensing them through a common outletto render a useful product which is not dangerous.

A further object of the invention is to provide an aerosoldual-dispensing shutoff valve having a pair of cooperatively operableshutoff valves in series with a pair of manually operable valve means,and wherein one of the shutoff valves is operable in response to liquidflowing from one source, and wherein the other shutoff valve isresponsive to liquid from another source, and subsequently, responsiveto gas from a gasifying propellent in said othei source automatically tocreate a pressure-differential change when liquid of said other sourceis substantially exhausted, and when gas from said gasifying propellentflows relative to the valve mechanism of the invention.

Further objects and advantages of the invention may be apparent from thefollowing specification, appended claims, and accompanying drawings:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a fragmentary sectional viewof a multiple fluid compartment aerosol container and showing an aerosoldualdispensing shutoff valve installed in connection therewith, and inaccordance with the present invention;

FIG. 2 is an enlarged fragmentary sectional view taken from the line 2-2of FIG. 1;

FIG. 3 is a view similar to FIG.,2,-but showing mechanism of the aerosoldual-dispensing shutoff valve of the invention in different operativeposition;

FIG. 4 is a fragmentary sectional view taken from the line 4 4 of FIG.2;

FIG. 5 is a sectional view taken from the line 55 of FIG. 2;

FIG. 6 is a fragmentary sectional view taken from the line 6-6 of FIG. 2

FIG. 7 is a sectional view taken from the line 7-7 of FIG. 2;

and

FIG. 8 is a sectional view taken from the line 8-8 of FIG. 2.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1 of thedrawings, the invention is utilized in connection with an aerosolcontainer which is a substantially rigid container preferably made ofmetal, or the like. This container 10 is adapted to contain a liquid anda gasifying aerosol-propellent fluid of conventional material, thepropellent fluid being capable of causing pressure inside the container10 and the pressure acts externally on an inner collapsible container12. This container 12 may be made of flexible plastic, or the like, andis adapted to contain a liquid therein. The flexible and collapsiblecontainer 12 is carried by a valve housing 14 of the invention and thevalve housing 14 carries a dip tube 16 which is adapted to reach to thenormally lower extremity at the interior of the container 10, as will behereinafter described.

The container 10 thus carries one source of pressurized fluid therein,and this source is disposed externally of the container 12, and theinterior of the container 12 carries another source of fluid, and bothsources thus communicate with valve mechanism internally of the housing14, as will be hereinafter described in detail.

The source of fluid in the container 10 is adapted to be conductedthrough the dip tube 16 into the valve housing 14, all as will behereinafter described in detail.

Disposed in the valve housing 14 is a hollow fluidconducting outletconduit or stem 18 having a dispenser head 20 mounted thereon. Thedispenser head 20 is adapted to move the conduit or stem 18 axially toactuate the manually operable dispensing valve mechanism of theinvention which is contained in the housing 14, all as will behereinafter described in detail.

As shown in FIG. 2 of the drawings, the valve housing 14 of theinvention is carried in a conventional manner by a cap 22 of thecontainer 10, and a lower end portion 24 of the housing 14 is enlargedand carries the collapsible container 12.

It will be understood by those skilled in the art that the dispensationand production of aerosol hot-foam shave lathers or oxidation hair dyesmay pose several problems and dangers due to the fact that theseproducts, when dispensed, are sued directly upon a person's face orhair, and that the materials individually contained in the container 10and the container 12 are reactive with each other to produce theproduct, but when dispensed individually, may be very harmful ordangerous. Accordingly, the valve mechanism of the invention is adaptedautomatically to shut off flow of both the sources of material in thecontainer 10 and the container 12 when either source is in a conditionof substantial depletion or exhaustion. Thus, the mechanism of the valveof the invention effectively prevents dangerous individual dispensationof fluids from either source in the container 10 or the container 12.

As shown in FIG. 2 of the drawings, the valve housing is provided with apassage 26 which communicates with the interior of the collapsiblecontainer 12 and a source of fluid therein. This passage 26 terminatesin an orifice 28 controlled by an automatic shutoff valve 30. Thisshutoff valve 30, as shown in FIG. 4, is provided with a circular sleeve32 operable in a circular bore 34 of the housing 14, and thus the sleeve32 is adapted to shut off flow of fluid from the passage 26 through theorifice 28.

The sleeve 32 is a hollow cylindrical sleeve having an integraldisc-shaped end portion 36 which is integral with a stem 38. Surroundingthe stem 38 are passage openings 40 in the end 36. These passageopenings 40 are adapted to allow flow from the orifice 28 into achamberarea 42 when the sleeve 32 is in the open position, as shown in FIG. 3of the drawings.

The stem 38 is provided with an enlarged portion having an externalgroove carrying an O-ring 44 which sealingly and slidingly engages thebore 34 in the housing 14.

Integral with the stem 38 is a flexible diaphragm structure 46 having acylindrical sleevelike peripheral mounting portion 48 which is held in abore portion 50 of the housing 14 by means of a cap 52 and a resilientseal gasket 54, all as shown best in FIG. 2 of the drawings.

The diaphragm structure 46 is provided with a flow orifice 56 extendingfrom one side 58 to the opposite side 60 thereof. This orifice 56 isadapted to conduct either liquid or gaseous fluid, as will behereinafter described.

A compression spring 61 is engaged with the side 60 of the diaphragmstructure 46, and the opposite end of the spring abuts a shoulder 62 inthe housing 14 thereby tending to move the diaphragm structure 46 intothe position, as shown in FIG. 2 of the drawings, wherein the sleeve 32of the shutoff valve maintains the orifice 28 is closed condition.

The chamber 42 communicates with a passage 64 in the housing 14.

This passage 64 also communicates with a passage 66 in a dispensingvalve housing member 68. This housing member 68 is fitted into aninternal bore 70 of the housing 14, and the dispensing valve housingmember 68 is provided with an internal bore 70 in which a hollowcylindrical valve seat member 72 is disposed. This member 72 is providedwith an inner end portion 74 engaged compressively against the perimeterof a flexible valve element 76 which is oppositely engaged by an end 78of a generally cup-shaped member 80 so that the flexible valve element76 is held in fixed position in the housing 14 by means of a portion 82of the cap 22. This portion 82 being engaged with a gasket 84 internallythereof which abuts outer adjacent ends of the valve housing 14, thedispensing valve housing member 68 and the corresponding outer end ofthe member 72.

The end portion 82 of the cap 22 is provided with an opening 86 throughwhich the hollow dispensing and actuating stem member 18 extends.

The gasket 84 is provided with a central opening 88 sealingly engagedwith the periphery of the member 18, and this member 18 is provided witha bore 90 which communicates with radially disposed slots 92 in thesidewall of the bore 90 near the normally lower end of the stem 18.

The resilient valve member 76 is provided with a central opening 94which normally communicates with the slots 92, and the valve seat member72 is provided with an annular seat portion 96 surrounding said opening94 and said slots 92, and one side of the resilient valve member 76 isis engaged with the annular seat portion 96 which is opposed by a seatportion 98 of the stem 18.

A spring 100 engages a shoulder 102 on the stem 18 and a shoulder 104 inthe valve member 72. This spring 100 being a compression spring andtending to force the stem 18 in a direction of an arrow A to cause thevalve seat portion 98 compressively to engage the resilient valve member76 and force it sealingly against the annular seat portion 96.

The valve seat member 72 is provided with an annulus 106 which surroundsthe annular seat portion 96 and communicating with this annulus is anorifice 108 which communicates with another orifice 110 extendingthrough the sidewall of the valve housing 68 and communicating with thepassage 66 which communicates with the passage 64 and the chamber 42,hereinbefore described. Thus, one source of fluid in the collapsiblecontainer 12 communicates through the passage 26, orifice 28, openings40, chamber 42, passage 64, passage 66, orifice 110, orifice 108, theannulus 106, and with the flexible valve element 76. Thus, this sourceof fluid communicates with a manually operable dispensing valvemechanism of the invention at one side of the flexible valve element 76.

A source of liquid and gasifying aerosol propellent is contained in thecontainer 10, as hereinbefore described, and said liquid, underpressure, may travel up the dip tube 16 and into the cap 52 and to oneside 58 of the diaphragm 46. Initially liquid passes up through the diptube 16 and through the orifice 56 and through a passage 112 and into achamber 114 at one side 116 of the flexible diaphragm structure 118.This flexible diaphragm structure 118 is provided with a central orifice120 which communicates with an enlarged bore portion 122 in a hollowcylindrical shutoff valve stem which is integral with the diaphragmstructure 1 16.

The orifice 128 is sized relative to the orifice 56 to maintain apressure differential across the diaphragm 46.

The passage 64, as hereinbefore described, communicates with one side ofthe diaphragm 118, opposite to that facing the chamber 114, and anormally upper end of the bore 122 terminates in a conical shutoff valveseat 126 which is engageable with a conical valve element 128 fixed tothe cupshaped member 88. Surrounding this conical valve element 128 arepassages 188 which communicate with the seat portion 98 engaging oneside of the flexible valve element 76, so that when the plunger or thestem 18 is pressed in a direction opposite to the arrow A, as shown inFIG. 2 of the drawings, the flexible valve element 76 is unseated fromthe annular seat portion 96 and the opposing valve seat portion 98 toallow fluid to pass upwardly through the openings 130 and around theflexible valve element and through its central opening 94, and throughthe slots 92, and upwardly through the slots 92, and upwardly throughthe bore 98 to the dispensing head 28, all as shown best in FIGS. 1 and22 of the drawings.

Thus, the fluid source in the container communicates through the diptube 16, cap 52, orifice 56, passage 112, chamber 114, orifice 128, bore122, openings 130, and the manually operable dispensing valve centralopening 94, and with the bore 88 of the stem 18.

It will be obvious to those skilled in the art that when fluidsconcurrently pass from both sources, contained in the containers 18 and12 around opposite sides of the flexible valve element 76, that thesematerials mix and may react with each other in the valve and in the bore90 of the stem 18 before being dispensed from the dispensing head 20,and thus chemically reactive materials may form a product duringdispensation and before being issued from the dispensing head 28.

In operation, liquid in the collapsible container 12 is pressurized bythe aerosol-propellent fluid contained in the container 18, and whichalso propels liquid into the dip tube 16. However, when thelast-mentioned liquid in the container 111 is exhausted and thepressurized fluid tends to gasify, the dip tube conducts gas which actsin relation to the orifice 56 to change a pressure differential acrossthe diaphragm 46'to close the shutoff valve 30.

The conical seat 126 and valve element 128 constitute another automaticshutoff valve mechanism of the invention which is operable by thediaphragm 118.

It will be seen that these two shutofi' valves 30 and 126 are responsiveto the separate fluid sources in the containers 10 and 12, and as willbe hereinafter described, the diaphragm structures 46 and 118 areoperable in relation to the separate fluid sources and cooperativelywith relation to both sources and in accordance with pressuredifferentials calculated to close the valves automatically in the eventfluid from either of the sources is substantially depleted or exhausted.Thus, the basic operation of the valve of the invention is to preventdispensation of either fluid singly from either of the sources in thecontainers 18 or 12. This is extremely important in connection with thedispensation of materials to produce oxidation hair dye or hot-foamshave lather, or other similar materials where harmful chemicalsindividually may be used to react with each other to produce a usefuland safe product.

OPERATION OF THE INVENTION When the manually operable dispensing valveof the invention is actuated by pressure inwardly on the head 28, thestem 18 moves inwardly ina direction opposite to the arrow A in FIG. 2of the drawings, and the flexible valve element 76 is unseated from theannular seat 96 and the seat 98 which is generally a poppet-shaped seatand integral with the stem 18. Thus, fluids may flow around oppositesides of the flexible valve element and mix in the slots 82 and throughthe opening 84 and in the bore 911 of the stem 88.

The shutoff valve 30 is normally held open when liquid is passingthrough the orifices 56 and 128. It will be appreciated that liquid, dueto its viscous nature, will create a substantially high-pressuredifferential across the diaphragm structure 46 in relation to theorifices 46 and 120, thereby causing compression of the spring 61, andmoving the sleeve 32 to expose the orifice 28 so that fluid may flowfrom the source in the collapsible container 12 and into the passage 26.This fluid may then flow through the openings 40 and into a chamber 42communicating with the passage 64 so as to deliver fluid to the annulus106 and one side of the manually operable resilient I dispensing valvemember 76. Concurrently fluid pressure in the passage 64 is imposed upona partial area of the diaphragm structure 118 at the side 124 whichsurrounds a central stem 125 of the diaphragm structure 118. Thispressure tends to hold the conical valve portion 126 away from the valveelement 128, and to allow fluid to flow through the orifice 56, thepassage 112, the orifice 120, the passage 122, and through the openings138 into communication with the then open manually operable dispensingvalve which is constituted by the flexible valve element 76, annularseat 96 and the annular seat 98.

It will be appreciated by those skilled in the art that the orifice 118in relation to the orifice 28 maintains sufficient pressure in thepassage 64 and on the side 124 of the flexible diaphragm so as tomaintain the valve element 128 uncovered by the corresponding conicalseat portion 126. The pressure differential being maintained across thediaphragm structure 118 so as to hold the shutoff valve 126 in openposition, it being appreciated that the passage of liquid through theorifice 56 creates a substantial pressure drop, and therefore asubstantially lower pressure in the chamber 114 than in the chamber 42as maintained by the relative sizes of the orifices 28 and 110.

When liquid is substantially depleted or exhausted from the innerportion of the container 10, and when aerosol propellent fluid gasifiesand conducts gas through the orifice 56, the pressure differentialacross the diaphragm structure 46 changes so as to increase the pressureat the side 60 of the diaphragm relative to the side 58 thereby changingthe differential across the diaphragm structure 46 tending to move thesleeve valve 32 from the position, shown in FIG. 3, to the closedposition, as shown in FIG. 2. This action automatically shuts off theorifice 28 and drops the pressure at the side 124 of the diaphragmstructure 118 thus allowing pressure in the chamber 114 to cause theconical seat portion 126 to seat on theconical seat portion 128 and toclose the shutoff valve structure at the conical seat portion 126, andto prevent flow through the orifice 120 and the openings incommunication with the flexible valve element 76. Thus, when liquidfails to flow through the orifice 56, both fluid sources in thecontainers 10 and 12 are automatically shut off.

In the event liquid becomes exhausted from the collapsible container 12and fails to flow through the orifice 28 so as to create a substantialpressure in the chamber 42, the reduction in pressure on the side 124 ofthe diaphragm structure 118 then allows the conical valve seat 126 to beseated on the conical valve element 128 and shut off flow through theorifice 120 and the openings 130 communicating with the manuallyoperable dispensing valve element 76. When fluid fails to flow throughthe orifice 120, pressure builds up in the chamber 114 and the passage128 so as to equalize pressure across the diaphragm structure 46,whereupon the spring 61 moves the sleeve valve 32 into a position fromthat, as shown in FIG. 3, to the closed position, as shown in FIG. 2,and thereby automatically shutting off flow through the orifice 28 fromthe source of fluid in the container 12.

It will be understood that the shutoff valve structure 30, as shown inFIG. 2, is in a closed automatic shutoff position with respect to one ofthe sources, namely, the one in the container 12 and in FIG. 3, theautomatic shutoff valve 126, communicating with the source of fluid inthe container 10, is shown in closed position.

Also the disclosure in FIG. 3 illustrates the manually operabledispensing valve in open position, wherein the stem 18 is moved inwardin a direction opposite to the arrow A, so as to dispense a product froma dispenser head 20.

The positions of the automatic shutoff valves in FIG. 3, are disposedand shown as they would be at the instant where fluids may besubstantially depleted or exhausted from the container 12, such as tocause the conical seat 126 to engage the conical shutoff valve element128, whereupon subsequently and immediately the pressure would equalizeacross the diaphragm 46 and cause the spring 61 to move the sleeve valve32 over the orifice 28, as hereinbefore described. From the foregoing,it will be appreciated that the depletion or exhaustion of fluid fromeither of the sources in the containers 10 or 12 will automatically shutoff both shutoff valves even though the manually operable dispensingvalve 76 of the invention is in open position. Thus, the automaticaction of the automatic shutoff valves of the invention insure thatneither of the fluids from the sources in the containers 10 or 12 may bedispensed individually.

It will be obvious to those skilled in the art that variousmodifications of the invention may be resorted to without departing fromthe spirit of the invention.

We claim:

1. In a dual-dispensing automatic shutoff valve, the combination of: amanually operable fluid-dispensing valve means; first and secondpressurized fluid sources communicating with said dispensing valvemeans; first and second fluid-pressure-responsive automatic shutoffvalve means communicating with said dispensing valve means and with saidfirst and second fluid sources, said first and second shutoff valvemeans being disposed to control the flow of fluids from said first andsecond sources to said fluiddispensing valve means, said first andsecond shutofl valve means being responsive to fluid of said sources,whereby a substantial depletion of either of said sources shuts off flowtherefrom to said dispensing valve means; said first source having aliquid material and a gasifying aerosol-propellent fluid; said firstshutoff valve means having a pressureresponsive movable wall providedwith opposed surfaces, one of said surfaces communicating with saidfirst source; first orifice means intercommunicating with opposedsurfaces of said movable wall means and with said dispensing valvemeans, whereby a pressure differential is created with respect to saidopposed surfaces when said dispensing valve means is open, and when saidliquid is flowing through said first orifices, and whereby the magnitudeof said pressure differential changes when said liquid is exhausted, andwhen only said gasifying aerosol propellent flows through said firstorifices;

said movable wall being responsive to said pressure-differential changeand thereby operable to move said first shutoff valve means towardclosed position to shut off communication of one of said sources withsaid dispensing valve means; said second shutoff valve means disposedand responsive to a change in fluid pressure of said last-mentionedsource downstream from said first shut off valve means, said second shutoff valve means communicating with fluid from the other of said sourcesand said second shutoff valve means being disposed to shutoff flow offluid from said other of said sources to said dispensing valve means.

2. In a dual-dispensing automatic shutoff valve, the combination of: amanually operable fluid-dispensing valve means; first and secondpressurized fluid sources communicating with said dispensing valvemeans; first and second fluid-pressure-responsive automatic shutoffvalve means communicating with said dispensing valve means and with saidfirst and second fluid sources, said first and second shutoff valvemeans being disposed to control the flow of fluids'from said first andsecond sources to said fluiddispensing valve means, said first andsecond shutoff valve means being responsive to fluid of said sources,whereby a substantial depletion of either of said sources shuts off flowtherefrom to said dispensing valve means; said first source having aliquid material and a gasifying aerosol-propellent fluid; said firstshutoff valve means having a pressureresponsive movable wall providedwith opposed surfaces, one of said surfaces communicating with saidfirst source; first orifice means intercommunicating with opposedsurfaces of said movable wall means and with said dispensing valvemeans; second orifice means communicating with said dispensing valvemeans downstream from said first orifice means and disposed to beshutoff from communication with said dispensing valve means by operationof said second shutoff valve means; whereby a pressure differential iscreated with respect to said opposed surfaces when said dispensing valvemeans is open, and when said liquid is flowing through said first andsecond orifice means, and whereby the magnitude of said pressuredifferential changes when said liquid is exhausted, and when only saidgasifying aerosol propellent flows through said first and second orificemeans; said movable wall being responsive to said pressure-differentialchange and thereby operable to move said first shutoff valve meanstoward closed position to shutoff communication of one of said sourceswith said dispensing valve means; said second shutoff valve meansdisposed and responsive to a change in fluid pressure of saidlast-mentioned source downstream from said first shutoff valve means,said second shutoff valve means communicating with fluid from the otherof said sources and said second shutoff valve means being disposed toshutoff flow of fluid from said other of said sources to said dispensingvalve means.

3. In a dual-dispensing automatic shutoff valve, the combination of: amanually operable fluid-dispensing valve means; first and secondpressurized fluid sources communicating with said dispensing valvemeans; first and second fluid-pressure-responsive automatic shutoffvalve means communicating with said dispensing valve means and with saidfirst and second fluid sources, said first and second shutoff valvemeans being disposed to control the flow of fluids from said first andsecond sources to said fluiddispensing valve means, said first andsecond shutoff valve means being responsive to fluid of said sources,whereby a substantial depletion of either of said sources shuts off flowtherefrom to said dispensing valve means; said first source having aliquid material and a gasifying aerosol-propellent fluid; said firstshutoff valve means having a pressureresponsive movable wall providedwith opposed surfaces, one of said surfaces communicating with saidfirst source; first orifice means intercommunicating with opposedsurfaces of said movable wall means and with said dispensing valvemeans, whereby a pressure differential is created with respect to saidopposed surfaces when said dispensing valve means is open, and when saidliquid is flowing through said first orifice, and whereby the magnitudeof said pressure differential changes when said liquid is exhausted, andwhen only said gasifying aerosol propellent flows through said firstorifice; said movable wall being responsive to said pressuredifferential changes and thereby operable to move said first shutoffcommunication of one of said sources with said dispensing valve means;said second shutoff valve means disposed and responsive to a change influid pressure of said last-mentioned source downstream from said firstshutoff valve means, said second shutoff valve means communicating withfluid from the other of said sources and said second shutoff valve meansbeing disposed to shutoff flow of fluid from said other of said sourcesto said dispensing valve means; said second shutoff valve means having amovable pressure-responsive wall means provided with opposed surfaces;one of said last-mentioned opposed surfaces responsive to pressure offluid downstream from said first orifice means and the other of saidlast mentioned surfaces being responsive to fluid pressure downstreamfrom said first shutoff valve means, whereby a reduction in pressure ofsaid fluid downstream from said first valve means causes said secondvalve means to move toward closed position and to shutoff fluid flowfrom said first orificc to said dispensing valve means.

4. in a dual-dispensing automatic shutoff valve, the combination of: amanually operable fluid-dispensing valve means; first and secondpressurized fluid sources communicating with said dispensing valvemeans; first and second fluid-pressure-responsive automatic shutoffvalve means communicating with said dispensing valve means and sourcehaving a liquid with said first and secondfluid-pressure-responsiveautomatic shutofi valve means communicating with said dispensing valvemeans and with said first and second fluid sources, said first andsecond shutoff valve means being disposed to control the flow of fluidsfrom saidfirst and second sources to said fluiddispensing valve means,said first and second shutoff valve means being responsive to fluid ofsaid sources, whereby a substantial depletion of either of said sourcesshuts off flow therefrom to said dispensing valve means; said firstsource having a liquid material and a gasifying aerosol-propellentfluid; said first shutoff valve means having a pressureresponsivemovable wall provided with opposed surfaces, one of said surfacescommunicating with said first source; first orifice meansintercommunicating with opposed surfaces of said movable wall means andwith said dispensing valve means; second orifice means communicatingwith said dispensing valve means downstream from said first orificemeans anddisposed to be shutoff from communication with said dispensingvalve means by operation of said second shutoff valve means; whereby apressure difi'erential is created with respect to said opposed surfaceswhen said dispensing valve means is open, and when said liquid isflowing through said first and second orifice means, and whereby themagnitude of said pressure differential changes when said liquid isexhausted, and when only said gasifying aerosol propellent flows throughsaid first and second orifice means; said movable wall being responsiveto said pressure-differential change and thereby operable to move saidfirst shutoff valve means toward closed position to shutoffcommunication of one of said sources with said dispensing valve means;said second shutoff valve means disposed and responsive to a change influid pressure of said last mentioned source downstream from said firstshutoff valve means, said second shutoff valve means communicating withfluid from the other of said sources and said second shutoff valve meansbeing disposed to shut off flow of fluid from said other of said sourcesto said dispensing valve means; said second shutoff valve means having amovable pressure-responsive wall means provided with opposed surfaces;one of said last-mentioned opposed surfaces responsive to pressure offluid downstream from said first orifice means and the other of saidlastmentioned surfaces being responsive to fluid pressure downstreamfrom said first shutoff valve means, whereby a reduction in pressure ofsaid fluid downstream from said first valve means causes said fluiddownstream from said first valve means causes said second valve means tomove toward closed position, and to shutoff fluid flow from said firstorifice to said second orifice means and said dispensing valve means;and third orifice means disposed between said first shutoff valve meansand said dispensing valve means for maintaining a desired fluid pressurein communication with said other of said surfaces of said movable wallof said second shutoff valve means.

5. In a dualdispensing, automatic shutoff valve, the combination of:afirst and second manually operable fluiddispensing valve means; firstand second pressurized fluid sources communicating respectively withsaid first and second dispensing valve means; first and secondfluid-pressureresponsive automatic shutoff valve means communicatingwith said first and second dispensing valve means and with said firstand second fluid sources, said first and second shutoff valve meansbeing disposed to control the flow of fluids from said first and secondsources to said first and shutoff valve means being responsive to fluidof said sources,

whereby a substantial depletion of either of said sources shuts off flowtherefrom to said dispensing valve means; said first material and agasifying aerosolpropellent; said first shutoff valve means having apressureresponsive movable wall provided with opposed surfaces, one ofsaid surfaces communicating with said first source; first orifice meansintercommunicating with opposed surfaces of said movable wall means andwith said dispensing .valve means; second orifice means communicatingwith said second dispensing valve means downstream from said firstorifice means and disposed to be shutoff from communication with saidsecond dispensing valve means by operation of said second shutoff valvemeans; whereby a pressure differential is created with respect to saidopposed surfaces when said dispensing valve means is open, and when saidliquid isflowing through said first and second orifice means, andwhereby the magnitude of said pressure differential changes when saidliquid is exhausted, and when only said gasifying aerosol propellentflows through said first and second orifice means; said movable wallbeing responsive to said pressure differential change and therebyoperable to move said first shutoff valve means toward closed positionto shutoff communication of said second source with saidseconddispensing valve 7 wall means provided with opposed surfaces; oneof said last mentioned opposed surfaces responsive to pressure of fluiddownstream from said first orifice means and the other of saidlast-mentioned opposed surfaces responsive to pressure of fluiddownstream from said first orifice means and the other of saidlast-mentioned surfaces being responsive to fluid pressure downstreamfrom said first shutoff valve means, whereby a reduction in pressure ofsaid fluid downstream from said first valve means causes said secondvalve means to move toward closed position and to shutoff fluid flowfrom said first orifice to said first dispensing valve means; and thirdorifice means disposed between said first shutoff valve mean and saidsecond dispensing valve means for maintaining a desired fluid pressurein communication with said other of said surfaces of said movable wallof said second shutoff valve means.

6. The invention, as defined in claim l, wherein: said first and secondsources comprise an external container for said first source; and acollapsible container disposed in said external container for containingsaid second source; said first and second sources including liquidmaterial; said first source containing a gasifying fluid-propellentelement adapted to pressurize both liquids in said external containerand in said collapsible container.

7. The invention, as defined in claim 4, wherein: said first and secondsources comprise an external container for said first source; and acollapsible container disposed in said external container for containingsaid second source; said first and second sources including liquidmaterial; said first source containing a gasifying fluid-propellentelement adapted to pressurize both liquids in said external containerand in said collapsible container.

8. The invention, as defined in claim 5, wherein: said first and secondsources comprise an external container for said first source; and acollapsible container disposed in said I external container forcontaining said second source; said first and second sources includingliquid material; said first source containing a gasifyingfluid-propellent element adapted to pressurize both liquids in saidexternal container and in said collapsible container.

1. In a dual-dispensing automatic shutoff valve, the combination of: amanually operable fluid-dispensing valve means; first and secondpressurized fluid sources communicating with said dispensing valvemeans; first and second fluid-pressureresponsive automatic shutoff valvemeans communicating with said dispensing valve means and with said firstand second fluid sources, said first and second shutoff valve meansbeing disposed to control the flow of fluids from said first and secondsources to said fluid-dispensing valve means, said first and secondshutoff valve means being responsive to fluid of said sources, whereby asubstantial depletion of either of said sources shuts off flow therefromto said dispensing valve means; said first source having a liquidmaterial and a gasifying aerosolpropellent fluid; said first shutoffvalve means having a pressure-responsive movable wall provided withopposed surfaces, one of said surfaces communicating with said firstsource; first orifice means intercommunicating with opposed surfaces ofsaid movable wall means and with said dispensing valve means, whereby apressure differential is created with respect to said opposed surfaceswhen said dispensing valve means is open, and when said liquid isflowing through said first orifices, and whereby the magnitude of saidpressure differential changes when said liquid is exhausted, and whenonly said gasifying aerosol propellent flows through said firstorifices; said movable wall beinG responsive to saidpressure-differential change and thereby operable to move said firstshutoff valve means toward closed position to shut off communication ofone of said sources with said dispensing valve means; said secondshutoff valve means disposed and responsive to a change in fluidpressure of said last-mentioned source downstream from said first shutoff valve means, said second shut off valve means communicating withfluid from the other of said sources and said second shutoff valve meansbeing disposed to shutoff flow of fluid from said other of said sourcesto said dispensing valve means.
 2. In a dual-dispensing automaticshutoff valve, the combination of: a manually operable fluid-dispensingvalve means; first and second pressurized fluid sources communicatingwith said dispensing valve means; first and secondfluid-pressure-responsive automatic shutoff valve means communicatingwith said dispensing valve means and with said first and second fluidsources, said first and second shutoff valve means being disposed tocontrol the flow of fluids from said first and second sources to saidfluid-dispensing valve means, said first and second shutoff valve meansbeing responsive to fluid of said sources, whereby a substantialdepletion of either of said sources shuts off flow therefrom to saiddispensing valve means; said first source having a liquid material and agasifying aerosol-propellent fluid; said first shutoff valve meanshaving a pressure-responsive movable wall provided with opposedsurfaces, one of said surfaces communicating with said first source;first orifice means intercommunicating with opposed surfaces of saidmovable wall means and with said dispensing valve means; second orificemeans communicating with said dispensing valve means downstream fromsaid first orifice means and disposed to be shutoff from communicationwith said dispensing valve means by operation of said second shutoffvalve means; whereby a pressure differential is created with respect tosaid opposed surfaces when said dispensing valve means is open, and whensaid liquid is flowing through said first and second orifice means, andwhereby the magnitude of said pressure differential changes when saidliquid is exhausted, and when only said gasifying aerosol propellentflows through said first and second orifice means; said movable wallbeing responsive to said pressure-differential change and therebyoperable to move said first shutoff valve means toward closed positionto shutoff communication of one of said sources with said dispensingvalve means; said second shutoff valve means disposed and responsive toa change in fluid pressure of said last-mentioned source downstream fromsaid first shutoff valve means, said second shutoff valve meanscommunicating with fluid from the other of said sources and said secondshutoff valve means being disposed to shutoff flow of fluid from saidother of said sources to said dispensing valve means.
 3. In adual-dispensing automatic shutoff valve, the combination of: a manuallyoperable fluid-dispensing valve means; first and second pressurizedfluid sources communicating with said dispensing valve means; first andsecond fluid-pressure-responsive automatic shutoff valve meanscommunicating with said dispensing valve means and with said first andsecond fluid sources, said first and second shutoff valve means beingdisposed to control the flow of fluids from said first and secondsources to said fluid-dispensing valve means, said first and secondshutoff valve means being responsive to fluid of said sources, whereby asubstantial depletion of either of said sources shuts off flow therefromto said dispensing valve means; said first source having a liquidmaterial and a gasifying aerosol-propellent fluid; said first shutoffvalve means having a pressure-responsive movable wall provided withopposed surfaces, one of said surfaces communicating with said firstsource; first orifice means intercommunicating with opposed surfaces ofsaid movable Wall means and with said dispensing valve means, whereby apressure differential is created with respect to said opposed surfaceswhen said dispensing valve means is open, and when said liquid isflowing through said first orifice, and whereby the magnitude of saidpressure differential changes when said liquid is exhausted, and whenonly said gasifying aerosol propellent flows through said first orifice;said movable wall being responsive to said pressure differential changesand thereby operable to move said first shutoff communication of one ofsaid sources with said dispensing valve means; said second shutoff valvemeans disposed and responsive to a change in fluid pressure of saidlast-mentioned source downstream from said first shutoff valve means,said second shutoff valve means communicating with fluid from the otherof said sources and said second shutoff valve means being disposed toshutoff flow of fluid from said other of said sources to said dispensingvalve means; said second shutoff valve means having a movablepressure-responsive wall means provided with opposed surfaces; one ofsaid last-mentioned opposed surfaces responsive to pressure of fluiddownstream from said first orifice means and the other of said lastmentioned surfaces being responsive to fluid pressure downstream fromsaid first shutoff valve means, whereby a reduction in pressure of saidfluid downstream from said first valve means causes said second valvemeans to move toward closed position and to shutoff fluid flow from saidfirst orifice to said dispensing valve means.
 4. In a dual-dispensingautomatic shutoff valve, the combination of: a manually operablefluid-dispensing valve means; first and second pressurized fluid sourcescommunicating with said dispensing valve means; first and secondfluid-pressure-responsive automatic shutoff valve means communicatingwith said dispensing valve means and with said first and secondfluid-pressure-responsive automatic shutoff valve means communicatingwith said dispensing valve means and with said first and second fluidsources, said first and second shutoff valve means being disposed tocontrol the flow of fluids from said first and second sources to saidfluid-dispensing valve means, said first and second shutoff valve meansbeing responsive to fluid of said sources, whereby a substantialdepletion of either of said sources shuts off flow therefrom to saiddispensing valve means; said first source having a liquid material and agasifying aerosol-propellent fluid; said first shutoff valve meanshaving a pressure-responsive movable wall provided with opposedsurfaces, one of said surfaces communicating with said first source;first orifice means intercommunicating with opposed surfaces of saidmovable wall means and with said dispensing valve means; second orificemeans communicating with said dispensing valve means downstream fromsaid first orifice means and disposed to be shutoff from communicationwith said dispensing valve means by operation of said second shutoffvalve means; whereby a pressure differential is created with respect tosaid opposed surfaces when said dispensing valve means is open, and whensaid liquid is flowing through said first and second orifice means, andwhereby the magnitude of said pressure differential changes when saidliquid is exhausted, and when only said gasifying aerosol propellentflows through said first and second orifice means; said movable wallbeing responsive to said pressure-differential change and therebyoperable to move said first shutoff valve means toward closed positionto shutoff communication of one of said sources with said dispensingvalve means; said second shutoff valve means disposed and responsive toa change in fluid pressure of said last mentioned source downstream fromsaid first shutoff valve means, said second shutoff valve meanscommunicating with fluid from the other of said sources and said secondshutoff valve means being disposed to shut off flow of fluid from saidother of said Sources to said dispensing valve means; said secondshutoff valve means having a movable pressure-responsive wall meansprovided with opposed surfaces; one of said last-mentioned opposedsurfaces responsive to pressure of fluid downstream from said firstorifice means and the other of said last-mentioned surfaces beingresponsive to fluid pressure downstream from said first shutoff valvemeans, whereby a reduction in pressure of said fluid downstream fromsaid first valve means causes said fluid downstream from said firstvalve means causes said second valve means to move toward closedposition, and to shutoff fluid flow from said first orifice to saidsecond orifice means and said dispensing valve means; and third orificemeans disposed between said first shutoff valve means and saiddispensing valve means for maintaining a desired fluid pressure incommunication with said other of said surfaces of said movable wall ofsaid second shutoff valve means.
 5. In a dual-dispensing automaticshutoff valve, the combination of: a first and second manually operablefluid-dispensing valve means; first and second pressurized fluid sourcescommunicating respectively with said first and second dispensing valvemeans; first and second fluid-pressure-responsive automatic shutoffvalve means communicating with said first and second dispensing valvemeans and with said first and second fluid sources, said first andsecond shutoff valve means being disposed to control the flow of fluidsfrom said first and second sources to said first and secondfluid-dispensing valve means, said first and second shutoff valve meansbeing responsive to fluid of said sources, whereby a substantialdepletion of either of said sources shuts off flow therefrom to saiddispensing valve means; said first source having a liquid material and agasifying aerosol-propellent; said first shutoff valve means having apressure-responsive movable wall provided with opposed surfaces, one ofsaid surfaces communicating with said first source; first orifice meansintercommunicating with opposed surfaces of said movable wall means andwith said dispensing valve means; second orifice means communicatingwith said second dispensing valve means downstream from said firstorifice means and disposed to be shutoff from communication with saidsecond dispensing valve means by operation of said second shutoff valvemeans; whereby a pressure differential is created with respect to saidopposed surfaces when said dispensing valve means is open, and when saidliquid is flowing through said first and second orifice means, andwhereby the magnitude of said pressure differential changes when saidliquid is exhausted, and when only said gasifying aerosol propellentflows through said first and second orifice means; said movable wallbeing responsive to said pressure differential change and therebyoperable to move said first shutoff valve means toward closed positionto shutoff communication of said second source with said seconddispensing valve means; said second shutoff valve means disposed andresponsive to a change in fluid pressure of said last-mentioned sourcedownstream from said first shutoff valve means, said second shutoffvalve means communicating with fluid from said first source and saidfirst source and said second shutoff valve means being disposed toshutoff flow of fluid from said first source to said first dispensingvalve means; said second shutoff valve means having a movablepressure-responsive wall means provided with opposed surfaces; one ofsaid last-mentioned opposed surfaces responsive to pressure of fluiddownstream from said first orifice means and the other of saidlast-mentioned opposed surfaces responsive to pressure of fluiddownstream from said first orifice means and the other of saidlast-mentioned surfaces being responsive to fluid pressure downstreamfrom said first shutoff valve means, whereby a reduction in pressure ofsaid fluid downstream from said first valve means causes said secondvalve means to move Toward closed position and to shutoff fluid flowfrom said first orifice to said first dispensing valve means; and thirdorifice means disposed between said first shutoff valve mean and saidsecond dispensing valve means for maintaining a desired fluid pressurein communication with said other of said surfaces of said movable wallof said second shutoff valve means.
 6. The invention, as defined inclaim 1, wherein: said first and second sources comprise an externalcontainer for said first source; and a collapsible container disposed insaid external container for containing said second source; said firstand second sources including liquid material; said first sourcecontaining a gasifying fluid-propellent element adapted to pressurizeboth liquids in said external container and in said collapsiblecontainer.
 7. The invention, as defined in claim 4, wherein: said firstand second sources comprise an external container for said first source;and a collapsible container disposed in said external container forcontaining said second source; said first and second sources includingliquid material; said first source containing a gasifyingfluid-propellent element adapted to pressurize both liquids in saidexternal container and in said collapsible container.
 8. The invention,as defined in claim 5, wherein: said first and second sources comprisean external container for said first source; and a collapsible containerdisposed in said external container for containing said second source;said first and second sources including liquid material; said firstsource containing a gasifying fluid-propellent element adapted topressurize both liquids in said external container and in saidcollapsible container.